No matter how cool your Mickey Mouse water bottle may look (hey, some people think it’s cool, okay?), it can’t hold water like the Exotac TiBottle. It’s called such because the bottle is made entirely of titanium. Not only is this metal light, it’s extremely strong as well and has been the go-to material for scientists looking to strengthen everything from fighter planes to spacecraft. Because the TiBottle is built tough, you can even use it to boil water when you go out camping. The bottle holds 22-oz of fluid. $75+.